Relief mechanism for gearing of machinery



No. 752,267. PATENTED FEB. 16, 1904.

I 0. G. TIDEMAN. RELIEF MECHANISM FOR GEARING 0P MACHINERY.

A PPLIOATION FILED NOV. 13, 1903.

H0 MQDEL.

UNITED STATES Patented February 16, 1904.

PATENT OFFICE.

CARL G. TIDEMAN, OF WORCESTER, MASSACHUSETTS.

RELIEF MECHANISM FOR GEARING OF MACHINERY.

SPECIFICATION forming part of Letters Patent No. 752,267, dated February 16, 1904. Application filed November 13, 1903. Serial No. 131,017. (No model.)

To all whom it may concern:

Be itknown that LOARL G. TIDEMAN, a citizen of the United States, residing at W'orcester, in the county of Worcester and State of 5 Massachusetts, have invented a new and useful Relief Mechanism for Gearing of Machincry, of which the following, together with the accompanying drawings, is a specification sufficiently full, clear, and exact to enable per- IO sons skilled in the art to which this invention appertains to make and use the same.

The object of my present invention is to provide an efiicient means in connection with the gearing of wire-drawing blocks and other ma- 5 chinery for preventing sudden strains or shock upon the driven members and avoiding the jerking pull upon the wire when starting the machine into action. a

. 'My invention consists in mechanism con- 2 structed and organized for operation substantially as explained in the following description and illustrated in the accompanying drawings, wherein- Figurel represents'a side view, partly in section, of a relief mechanism embodying my invention. Fig. 2 represents a top plan view of the same; Fig. 3, a longitudinal vertical section of the resistance-cylinder and. piston drawn to somewhat larger scale. Fig. 4 is a 3 transverse section of the cylinder; Fig. 5, a

back view of the pistonhead, and Fig. 6

shows the arrangement of the relief mechan-- 'ism in combination with the wire drawing block and its driving-shafts.

As shown in .the drawing's,"my improve mechanism comprises a 'wheel or gear A and a shaft B,.; upon whichsaid wheel is mounted to turn-looseor not keyed 'thereon; Either the gear Aor the shaft B-can "be in itsoi'der 4 the driving element as inany instancedesired;

but for the purposes 1 0f thisdescription 'itis" assumed that the direction in which power" and motion is transmitted is' from the ge'arto' the shaft, :such being the arrangement most conveniently applicable towire-dr wing ma- Gindicates an armed hub, swing member,

or cross-head arrangedupon the shaft-adjacent tothe hub of the gear-wheel A and firmly- 5 keyed tort-he shaft by a spline b'or other efliof the pin or secured in any other eflicient sistance to the piston movement.

cient fastening, so that the cross-head, its

arms 1 and 2, and shaft B will move together.

D indicates a resistance-cylinder pivotally connected with the gear-wheel in a manner that permits free oscillatory movement of the cylinder in relation to the wheel. As shown, a pintle or wrist-pin 3, formed on the bottom of the cylinder-body, extends through a bearing formed in the arm or plate of the gearwheel and is secured in place by proper shoulders and a nut 4, arranged on the screwthreaded end of the pintle at the under. side of the gear-Wheel. The interior of the cylinder is provided with aIpiston-chamber 5, and a supplemental chamber 6 is combined therewith, a suitable by-pass 7 being provided from one chamber to the other adjacent to the cylinder-head. ApistonF is fitted to move within the chamber 5 and is connected by a pistonrod I with the arm 1 of the cross-head C. Suitable packing devices are provided for the rod where it passes through the cylinder-head, and said head is tightly secured to the cylinder-body. The piston-disk is provided with one or more openings, holes, or ports 9 (preferably two) directly through it.

Within the interior of the cylinder I provide rigidly-projecting tapered pins or obstructing members 10 in corresponding alinement with the respective openings 9' and onto which said-openings advance when the piston F is forced inward. The. pins 10 can be threaded into the end of the cylinder-body or held therein by a nut on the threaded end manner. a When in use; the piston-chamber 5 is filled withoil'or other suitable liquid to afford re-j The sup;

pleme'ntal chamberfl afiords space for a"mod- '25 ferate'amountofair and space for receivingthejf oil when forced fromtli'episton chamber5 byf. 'advance'ofthepiston rod thereintofif a 1 The supplementaryfchamber Scanbe'lmadQ *of a y" cbnvenient size and form and located at'any convenient-position relation to the i cylinder-body, the 'by-p'ass opening 7 thereinto leading'o'ut from the piston chamberfi at a position back of the piston-disk when the "I latter is; retracted. The taper'or form ofthe 1 pin or obstructing member 10 can in any instance be made with more'or less degree of taper or the taper varied so as to close the piston-ports 9 with greater or less quickness or at any particular point of its movement alongthe chamber 5.

G indicates a spring-resistance device, consisting of a segmental guard formed on or attached to'the gear-wheel A and provided with an end abutment 8 and a support-way or circular cradle, preferably grooved along its inner face, with a spring or springs Sdisposed therein for exerting force against the arm 2 of thecross-head C in a direction for drawing the piston F toward the head of the cylinder and retaining the parts at normal idle position. In the present instance, as illustrated, the coiled-wire spring or springs S-one, two, or more of which can be employedare arranged to act by their expansive force between the abutment 8 and arm 2, the guard being arranged for keeping said springs on the circular arc corresponding with the swing movement of the end of the arm 2, which is provided with a seat or bearing for the end of the spring or springs suitable for keeping the same in proper relation thereon as the movements'are effected.

As applied to a wire-drawing block the gear-wheel with relief mechanism is arranged upon the upright shaft B, that carries upon its I upper end the draft block or drum 15, which maybe of usual or any suitable construction for pulling wire through the reducing-die at 16, .whichdi e and its support may be of the usual well-known construction. The gearwheel A is driven by a gear or pinion H on the operating or power shaft P. The direction of the operative rotation is indicated by a of the driven members and the arrow at 20 on Fig. 2. The clutch M for stopping and starting the mechanism may be arranged at any convenient position and operated by any suitable means.

In the operation when the clutch or power is thrown in for starting the mechanism the force of the. power movement acts to .carry forward the gear-wheel A, while the inertia strain of the wire from the die 16 acts as an opposing force through the shaft Band cross-head. The opposing force thus exerted tends to press the piston F inward against the body of oil in the piston-chamber 5 and to also compress the spring or springs S. As the oilcan escape from the chamber only by flowing through the holes 9 in the piston, a resistance is afforded which, though slight at first, greatly increases in amount as the piston F'moves toward the farther end of the chamber and the tapered pins 10 more and more obstruct or close the holes 9 in the piston, reduce the speed at which the oil andthereby can escape from in front of the piston. The compression of the springs S, which is simultaneously effected, also affords some additional resistance. The eflect produced by this mechanism is that instead of a quick inelastic start, as with ordinary gearing, and the instant jerking of the wire into full-speed movement the relief mechanism affords an easy elastic starting of the operated members and with a yielding eflect proportional to the power required for bringing the operated members and wire draft without shock or extra strain from their inert condition up to the normal speed of movement. When the piston strikes the end of the cylinder, the power is transmitted by apositive unyielding advancement so long as the force is greater than the spring tension. When the clutchM or power is thrown off, the piston is caused to return to its primal position at the head of the cylinder by the expansive action of the spring or springs S, which causes the gear-wheel and cross-headvarms to assume their original relation to each other. While my invention is more especially designed for use in combination withwire-drawing machines, it may be employed in other machinery with equivalent effect, and I desire to include such use as within the scope of my claims.

I am aware that changes may be made in the construction of my relief mechanism by those skilled in the art without departing from the essential idea of means expressed in the claims. Therefore I do not wish to be limited to the special form of its embodiment herein shown.

What I-claim, and desire to secure by Letters Patent, is

1. A relief mechanism for gearing, comprising a wheel, a shaft whereon said wheel is loose mounted, a cross-head member mounted tight upon said shaft, an oil-resistance cylinder carried by said wheel, a piston within said cylinder and connectedv with said cross-head member, a spring arranged between the wheel and cross-head member and exerting tension for normally returning the parts to their primal position with the piston at the end of the cylinder.

2. A relief mechanism for gearing,'comprising a shaft, a gear or wheel loose mounted thereon, a cross-head keyed to said shaft, a liquid-resistance cylinder pivotally attached to said gear-wheel, and having a piston-chamber and supplementary chamber, a piston-rod connected-with said cross-head and carrying a piston having openings therethrough that works in said cylinder, tapered obstructionpins fixed in said cylinder in alinement with the openings in the piston, and a reactingspring for returning the piston to its primal position. i 3. In a relief mechanism of the character de:

scribed, the resistance-cylinder comprising a piston-chamber, and a supplementary chamber, with a by-pass uniting said chambers, ta-

pered projecting pins within the piston-cham-' ber; in combination with a piston, provided with openings in alinement with said pins and through which the said pins are projected as the piston advances, for the purpose set forth.

4. In a relief mechanism of the character described, the segmental spring-supporting guard having a spring-seating end abutment and a circular spring-supporting face along its inner curve; in combination with the wheel, the cross-head having an arm, an axial shaft for said wheel and cr0sshead, and a coiledwire spring disposed between said abutment and cross-head arm within said guard.

5. The combination, of a shaft, a gear or wheel mounted loose thereon, a spring-resisb anee devicecarried on said wheel, an oil-reof the piston-ports as the piston advances, andv a cross-head carried and fixed on said shaft, and

having arms that respectively engage with said oil-resistance piston and said spring-resistance spring, for the purposes set forth.

' Witness my hand this 12th day of Novem: ber, 1903. CARL G. TIDEMAN.

Witnesses:

CHAS. H. BURLEIGH, Smnon E. KING. 

